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Cyclodextrin complexes of zinc porphyrin-tetraviologen supramolecule. Magnetic field effect on the recombination kinetics of their triplet radical ion pair states

✍ Scribed by Vladimir Ya. Shafirovich; Elena E. Batova; Peter P. Levin

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 472 KB
Volume: 210
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89107-s

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✦ Synopsis

In aqueous solutions a-and y-cyclodextrins (CDs) separate the ground state complexes of the porphyrin (P) and viologen (Vi'+) moieties in the zinc porphyrin-tetraviologen supramolecule and modulate dynamics of the connecting polymethylene chains between P and Vi*+. Effects of the chain dynamics being strongly dependent on the CD pore size appear in the quite different rates of the intramolecular quenching of 'P by Vi*+ and the recombination rates of the supramolecule triplet radical ion pair states in an external magnetic field.

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✍ Peter P. Levin; Vladimir Ya. Shafirovich; Elena E. Batova; Vladimir A. Kuzmin 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 547 KB

## AhStNCt The recombination kinetics of protonated and perdeuteriated chain-linked ( ( CH2), linker, n = 3, 6, and 10) triplet ketylphenoxyl radical pairs (RP ) have been examined by using the laser flash technique under an external magnetic field. The high values of magnetic isotope effect (MIE)